Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 9/4/2025

Diagnostic Imaging and Management of Os Peroneum

Diagnostic Imaging

  • MRI is generally accepted to achieve high sensitivities (>90%) in diagnosing ankle tendon tears and can help evaluate the peroneus longus tendon and os peroneum, according to the American College of Radiology 1
  • Ultrasound can be useful for evaluating the peroneal tendons, with one study showing 100% sensitivity and 90% accuracy in diagnosing peroneal tendon tears, as reported by the American College of Radiology 1
  • Dynamic ultrasound assessment is particularly valuable for evaluating tendon subluxation and dislocation, with a reported positive predictive value of 100% compared with surgical findings, as stated by the American College of Radiology 1

REFERENCES

1

acr appropriateness criteria<sup>®</sup> chronic ankle pain. [LINK]

Journal of the American College of Radiology, 2018